If you haven’t heard, the new Office & SharePoint 2013 Developer Preview has a brand new development model that should make it a lot easier and flexible to build consumer and enterprise applications running within Office & SharePoint. Based on web technologies like HTML5, XML, CSS3, JavaScript, and REST APIs, you can use your existing knowledge of these web technologies to quickly build your apps. What’s cool is these apps can not only run in the desktop versions of Office, they can also run in the web app versions.